With the continuous integration of informatization and industrialization, unprecedented development opportunities have been brought to the information and communication industry. The integration of “two modernizations” is to integrate modern communication technology and information technology into the production process of traditional industries, in order to achieve the purpose of improving production efficiency, reducing production costs, and stimulating the growth of economic benefits in various industries. Huawei eWBB wireless campus solution based on LTE, as a new type of production operation tool, adopts the latest wireless broadband access technology, and effectively solves the main problems faced by the campus network, and effectively solves the comprehensive bearing of voice, data, and multi-services. Main issues such as user communication, mobility, ultra-long-distance coverage and interoperability with existing systems. Through the application of this new solution, various industrial fields will significantly increase the economic benefits and generate a good return on investment.
1. The development of intelligent campus network requires wireless technology
Under the trend of wireless broadband and mobile development, smart parks have higher and higher requirements for wireless network technology. The simple voice function provided by traditional wireless networks can no longer meet the requirements of industrial informatization: a large number of video transmissions require the system to provide 100Mbps Even higher throughput rate; reliable QoS guarantee mechanism to ensure the reliable transmission of key information at all times; sensors all over the corners of modern industrial parks require the system to have the ability to have an almost unlimited number of connections….
2. Challenges faced by wireless solutions in smart campus networks
1) Challenges faced by WLAN technology
At present, the private network solutions for wireless campus networks in the industry are usually based on 802.11 WLAN technology, which is based on CSMA/CD. The application of this technology can provide limited broadband services for smart campus networks, but there are also many problems:
s Transmission quality: when there are few users, it can provide users with better broadband services. When the number of users exceeds about 20, the transmission performance drops sharply, and the transmission bandwidth and QoS are difficult to guarantee; in addition, because the APs all work in ISM Frequency band, it is very easy to be interfered by devices (microwave ovens, other APs, cordless phones, etc.) that also work in the ISM frequency band during the transmission process, thus affecting the transmission quality of the system.
s Mobility: 802.11 series technologies were positioned as office wireless broadband access at the beginning of research and development, and naturally do not support mobility. Users moving within the coverage of two APs will temporarily interrupt the connection to the network and affect system reliability.
s Maintainability: WLAN devices have low transmit power, and a single AP can only cover 100~300m. Therefore, a large number of APs are required to complete the coverage of the enterprise campus. The related engineering and subsequent maintenance workload is huge, and the detection when problems occur, Repair is very difficult.
2) Challenges faced by public network technology
At present, some enterprise campus network customers provide them with wireless broadband services through the public network operator network, but due to the characteristics of their networks for the main customers, it is difficult to take into account the service quality of public network and private network services:
s Network service quality: For ordinary public customers, ordinary public network operators focus on the coverage of hotspot areas, the improvement of customer service experience, and the improvement of APRU; while enterprise customers pay more attention to the wireless solutions in various complex scenarios. Efficient integration of all aspects of the workflow to improve the operational efficiency of the enterprise. Due to the different demands of enterprise customers and ordinary public customers, it is often difficult for public network operators to provide corresponding service quality to meet the improvement of enterprise operation efficiency.
s Diversified coverage scenarios: The application of wireless smart parks covers energy, electricity, airports, large enterprises (hospitals, education) and other industries. Energy fields (such as oil, mining, etc.) are located in deserts, Gobi, remote mountains or coasts, and public network operators often provide limited coverage or even no coverage in relevant areas. For example, offshore oil fields are often located in areas tens or hundreds of kilometers away from the coastline, requiring a single base station to cover more than 100KM, and a throughput rate of tens or even hundreds of Mbps. The process is constantly changing, so it is required that the base station covers as wide an area as possible and can easily change its deployment location when needed.
s Specialization: Public network operators usually only provide standardized solutions for the general public, while in the enterprise field they often put forward higher professional requirements for solutions: The energy field requires high-security explosion-proof terminals to ensure absolute safety in daily operations. Safety; in the field of power distribution automation, the terminal is required to have 100% online rate to ensure real-time and reliable transmission of power distribution data, and the ratio of uplink and downlink time slots for data transmission is required to be flexibly configured to facilitate business expansion; in the field of airport scheduling, A set of wireless systems is needed to support broadband data, voice, cluster and video services at the same time. The entire command and dispatch data can be assigned to each executive agency through a set of systems to improve the coordination of operations…
3. eWBB LTE wireless broadband multimedia smart campus solution
1) LTE is the best technology for wireless broadband in smart campuses
LTE is the latest mobile broadband technology defined by 3GPP, an authoritative organization in the field of mobile broadband, supported by the most extensive industry chain. Its air interface adopts OFDM+MIMO technology. When the bandwidth is 20MHz, the downlink peak rate is 100Mbps and the uplink peak rate is 50Mbps. According to the future 3GPP LTE-A plan, when the bandwidth is 100MHz, its throughput can be increased to the peak downlink 1Gbps in the future. , the uplink peak value is 500Mbps; secondly, LTE adopts the two-layer networking architecture of EPC + eNodeB, which greatly reduces the transmission delay of the system. The minimum one-way transmission delay on the access side is less than 5ms, and it has a complete multi-user scheduling mechanism and QoS guarantee mechanism; Finally, LTE can support 350km/h high-speed coverage and 100km coverage distance, which is convenient to provide wireless broadband coverage services for customers in various complex scenarios.
LTE technology effectively balances throughput, coverage, QoS, multi-user and high mobility and many other aspects, and is undoubtedly the most ideal technology for building a wireless intelligent campus network.
2) Mature, professional, high-performance, flexible and evolvable eWBB LTE campus network solution
As of the GSA report on July 11, 2012, the number of global LTE and EPC contracts for Huawei has reached 45 and 35 respectively, ranking first in the world ahead of industry giants such as Ericsson and Nokia Siemens Networks.
The eWBB LTE campus network solution is a customized solution for enterprise users developed based on the above products and solutions. Carrier-grade network equipment is not suitable for direct application to the construction of general enterprise campus networks. For example, the core network equipment is too large for enterprise customers; it is difficult for enterprise customers to apply for the operator’s frequency resources to operate their own campus network; enterprises Most of the customer’s operation scenarios are in harsh environments, such as high temperature, low temperature, oil and gas, sandstorm, etc. The eWBB LTE solution fully considers these factors in the research and development, and on the basis of inheriting the carrier-class high-performance network, an industry-oriented professional, flexible deployment and eWBB LTE solution has been formed.
In the specialization of the solution, the terminal is a crucial part. Terminals often work in various extremely harsh environments such as high temperature, high pressure, full of oil and gas, storms, dust and vibration. Huawei provides a series of platform-based enterprise wireless solution terminals to effectively solve the above problems. For example: eH811 Ex explosion-proof handheld terminal, in line with IP67, can work at -20 degrees ~ 55 degrees, meeting Ex ic IIC T4 explosion-proof standard; eA660 developed for outdoor mobile broadband access supports internal lightning protection, no need to add any external protection to it Lightning protection, easy to use in harsh environments, in addition, this Device also conforms to the MIL_STD_801F shockproof standard, and can be quickly installed in park vehicles to provide real-time high-quality data business services.
The deployment scenarios of enterprise campuses are diverse, the available spectrums in different countries are also very different, and the network scales are different. Therefore, the campus network requires solutions with good flexibility to adapt to the needs of various scenarios, while maintaining the original LTE system. high performance. In terms of performance, the eWBB LTE solution not only inherits the advantages of the original operator’s network, but also optimizes the design for the special needs of enterprise customers. For example, the ultra-long coverage solution provided by Huawei can solve the coverage problem of offshore oil fields at a distance of 100Km from the coastline. , under 20MHz bandwidth, it provides downlink peak 100Mbps and uplink peak throughput rate of 50Mbps. A set of system provides high-performance wireless transmission, and also provides support for mobility; another example, in dense urban or remote areas, wiring exists Huawei’s eRelay self-backhaul solution greatly reduces wired deployment through wireless self-backhaul, which can support users to quickly build a wireless campus coverage network using wireless in a short period of time.
In response to the problem of spectrum differentiation in different countries and regions, on the one hand, eWBB LTE has specially designed 1.8G TDD, 3.7G TDD and 5.0G TDD solutions for the enterprise market to meet the needs of different countries and markets; on the other hand, base stations, terminals All of them adopt platform-based design, and the RF module and the hardware system module are decoupled design, which is convenient and fast to meet the customized needs of customers.
For campus networks of different scales, Huawei eWBB LTE also provides flexible solutions for adaptation. For the ultra-small campus network, the convenience of deployment is very prominent. Two people can carry an Instant Broadband system weighing about 32KG into the campus, and the system can be installed in about 30 minutes. For medium-sized networks, Huawei’s miniaturized single-frame core network solution, combined with Huawei’s distributed base stations, can quickly support the construction of enterprise wireless networks. The coverage radius of a single station can reach up to 15km, saving customers CAPEX. In addition, the core network designed based on the all-IP architecture can provide voice solutions and support the connection with the customer’s IPPBX system, which saves customer investment and improves operational efficiency.
4. Future Outlook
The eWBB LTE intelligent campus network solution is a set of solutions customized and developed for enterprise campus customers based on Huawei’s advanced LTE/EPC platform architecture. At present, it has been used in a foreign hospital, airport, and offshore oil field coverage project. In the future, with the continuous evolution of LTE technology, Huawei’s eWBB LTE solution will continue to strengthen open cooperation with industry partners, provide campus solutions that are more in line with industry customers, and help industry customers with informatization and automation. Contribute to the improvement of overall operational efficiency.